Won't start when hot?
Posted
#1620317
(In Topic #221605)
Newbie
I have 1982 Golf GTI 1.8 DX engine, the car has just been recommissioned after 8years dry storage, this included new fuel pump and battery, full flush of fuel system and tank (fuel had gone off)!!
It starts from cold first time, starts a little lumpy but then runs fine, I can run it for 30mins park up, switch it off and it will not restart? I typically have to wait 1hour for it to cool down then it will start again.
To date I have replaced the Coil, leads, distributor cap, rotor arm, plugs and ignition amplifier. With no change it still won't start when hot!!
It was fine before it was taken off the road 8 years ago.
Any advice, guidance or recommendations on this would be much appreciated.
Posted
Local Hero
They are pretty pricey to replace, there is a trick to test if it has gone by slackening off the screw at the end of the accumulator (if it's not rusted in) and if fuel come out it's had it I understand.
I have same issue, started last year, I will get the accumulator changed in the winter, but for now the way to get it to start is to keep the accelerator flat to the floor and churn the starter for about 30 secs and it eventually runs.
Golf GTI Campaign 1983 Mars Red, Ford S-Max 2015, Audi TT 180 quattro 2003, Fiat 500C 2013, Golf GTE MK7.5
Posted
Old Timer
From cold it will start then run a bit rough until the excess fuel is burnt, from hot the excess fuel will make it so rich it won't start.
What happens if when hot you turn it off, leave it for just a second or two then try to start it.
Ideally you need to do a holding pressure test with a gauge.
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Posted
Newbie
When I turn it off after a run it will fire up straight away, but if left it won't start!
I think one of the injectors has been sticking, so fuel could be leaking round these!!
I will report back with updates.
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Settled In
Fuel check valve changed with filter, still the same!
I'm more towards leaky injector or fuel leak.
Can't see it been accumulator as it starts from cold overnight and the accumulator is designed to hold pressure over night, which it is.
Worst case is metering head.
Keep me posted and I'll
Do the same
Posted
Local Hero
Golf GTI Campaign 1983 Mars Red, Ford S-Max 2015, Audi TT 180 quattro 2003, Fiat 500C 2013, Golf GTE MK7.5
Posted
Settled In
so what was the issue?RichardHall said
I replaced the injectors on mine, made the car run better but sadly didn't cure the Hot starting.
Posted
Local Hero
If your non return valve was replaced on the end of the pump at the same time as the pump then its leaky injectors causing the problem. it has a double whammy effect by filling the cylinder with fuel therefore flooding it and also the fuel pressure drop while the engine is hot causes the fuel to boil in the injector lines above the engine and that plays havoc with the injectors as it replaces the liquid fuel with vapour locks.
When the engine has cooled it loves that little bit of extra fuel that leaked out when the pressure was up so cold starts are fine. I had it with my Camapign that had been stood 25 years. Once I sorted the hot start issue it highlighted the 5th injector wasn't working because I no longer had theis leaked fuel sat in the cylinders waiting for a cold start.
Posted
Local Hero
H3LTER said
so what was the issue?RichardHall said
I replaced the injectors on mine, made the car run better but sadly didn't cure the Hot starting.
Don't know yet, still not fixed, thought it was accumulator but as Yomp has pointed out could be the non return valve.
Golf GTI Campaign 1983 Mars Red, Ford S-Max 2015, Audi TT 180 quattro 2003, Fiat 500C 2013, Golf GTE MK7.5
Posted
Settling In
I have had the same problem ,
I started easily when cold , and when hot with difficulties ,
After having changed pressure accumulator , non return valve on pump line , i solved this problem with new injectors .
If that can helps…………….
LIGHTER IS FASTER !!!
Posted
Old Timer
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LIGHTER IS FASTER !!!
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